Record label Sub Pop, famous for releasing records by everyone from Nirvana to The Postal Service are going to be having a 2-day festival in Seattle, WA to commemorate their 20th anniversary.

Besides playing host to The Vaselines first U.S. performances ever and seeing many older Sub Pop bands re-unite, one of the most anticipated acts to play is Green River. If you don’t know, Green River was one of the first bands to release a record on Sub Pop and featured future members of Mudhoney and Pearl Jam.

Pearl Jam bassist Jeff Ament spoke to Billboard.com regarding the reunion show…

“Bassist Jeff Ament tells Billboard.com the group re-learned two unreleased songs from its early demo, “Baby, Help Me Forget” and “Leech,” for the occasion, which will mark Green River’s first show in nearly 21 years.

“Green River, which also includes Pearl Jam guitarist Stone Gossard, Mudhoney principals Mark Arm and Steve Turner and drummer Alex Vincent, rehearsed twice in late April but has reconvened three additional times to relearn the material.

“Last night, felt like we were 95% there,” Ament says. “We had a go at 16 or 17 songs and we have 14 right now, but we may need to get that down to 11 or 12 for Sunday. We have a 40-minute slot.”

The band is reportedly having fun playing together and there is talk of a possible Green River reunion tour.

Source.